<template>
  <div>
    <div class="select-box">
      <el-select v-model="currentYear" size="small" style="width: 120px; margin-right: 10px" @change="change">
        <!-- 年份取给定年份的, 前五年 + 后五年  2017---2022---2027    -->
        <el-option v-for="item in yearList" :key="item" :label="item" :value="item" />
      </el-select>
      <el-select v-model="currentMonth" size="small" style="width: 120px;" @change="change">
        <el-option v-for="item in 12" :key="item" :label="item" :value="item" />
      </el-select>
    </div>

    <!--
        date:时间对象  Fri Jul 08 2022 08:00:00 GMT+0800 (中国标准时间)
        data:时间信息        { "isSelected": true, "type": "current-month", "day": "2022-07-01" }
     -->
    <el-calendar v-model="currentDate">
      <template #dateCell="{date,data}">
        <div class="date-content">
          <span class="text">{{ getDay(data.day) }}</span>
          <span v-if="isWeek(date)" class="rest">休</span>
        </div>
      </template>
    </el-calendar>
  </div>
</template>

<script>
export default {
  name: 'WorkCalendar',
  props: {
    startDate: {
      type: Date,
      // 父向子传值 如果是引用类型,设置默认值时,值要写成函数 函数的返回值再写默认对象
      default: () => {
        return new Date()
      }
    }
  },
  data() {
    return {
      currentYear: '',
      currentMonth: '',
      //   yearList: [] // [2017,.....2027]    2022
      currentDate: ''
    }
  },
  computed: {
    yearList() {
    // 1.方式1
    //   const arr = []
    //   for (let i = this.currentYear - 5; i <= this.currentYear + 5; i++) {
    //     arr.push(i)
    //   }
    //   return arr

      // 2.方式2
      return Array.from(new Array(11), (item, index) => index - 5 + this.currentYear)
    }
  },
  watch: {
    currentDate(newVal) {
      this.currentYear = newVal.getFullYear()
      this.currentMonth = newVal.getMonth() + 1
    }
  },
  created() {
    this.currentYear = this.startDate.getFullYear()
    this.currentMonth = this.startDate.getMonth() + 1
    this.change()
  },

  methods: {
    //   年月下拉框数据同步到日历组件中
    change() {
      this.currentDate = new Date(`${this.currentYear}-${this.currentMonth}-01`)
    },

    getDay(day) {
      // day 2022-07-02 => [2022,07,02] => 02  => 2
      const str = day.split('-')[2]
      return str.startsWith('0') ? str.substr(1) : str
    },

    isWeek(date) { //   12345 6 0
      if (date.getDay() === 6 || date.getDay() === 0) {
        return true
      } else {
        return false
      }
    }
  }
}
</script>

<style lang="scss" scoped>
.select-box {
  display: flex;
  justify-content: flex-end;
}

::v-deep .el-calendar-day {
  height:  auto;
 }
::v-deep .el-calendar-table__row td::v-deep .el-calendar-table tr td:first-child, ::v-deep .el-calendar-table__row td.prev{
  border: none;
 }
.date-content {
  height: 40px;
  text-align: center;
  line-height: 40px;
  font-size: 14px;
}
.date-content .rest {
  color: #fff;
  border-radius: 50%;
  background: rgb(250, 124, 77);
  width: 16px;
  height: 20px;
  line-height: 20px;
  display: inline-block;
  font-size: 12px;
  margin-left: 10px;
}
.date-content .text{
  width: 20px;
  height: 20px;
  line-height: 20px;
 display: inline-block;

}
::v-deep .el-calendar-table td.is-selected .text{
   background: #409eff;
   color: #fff;
   border-radius: 50%;
 }
::v-deep .el-calendar__header {
   display: none
}
</style>
